UtilityClassChecker (ONOS Java API (2.5.0))

java.lang.Object
- org.onlab.junit.UtilityClassChecker

```
public class UtilityClassChecker
extends Object
```
Hamcrest style class for verifying that a class follows the accepted rules for utility classes. The rules that are enforced for utility classes: - the class must be declared final - the class must have only one constructor - the constructor must be private and inaccessible to callers - the class must have only static methods

Constructor Summary

Constructors
Constructor Description

UtilityClassChecker()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`assertThatClassIsUtility(Class<?> clazz)`	Assert that the given class adheres to the utility class rules.
`void`	`describeMismatch(org.hamcrest.Description description)`	Describe why an error was reported.
`void`	`describeTo(org.hamcrest.Description description)`	Describe the source object that caused an error, using a Hamcrest Matcher style interface.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - UtilityClassChecker
```
public UtilityClassChecker()
```
- Method Detail
  - describeMismatch
```
public void describeMismatch(org.hamcrest.Description description)
```
    Describe why an error was reported. Uses Hamcrest style Description interfaces.
    
    Parameters:
    
    description - the Description object to use for reporting the mismatch
  - describeTo
```
public void describeTo(org.hamcrest.Description description)
```
    Describe the source object that caused an error, using a Hamcrest Matcher style interface. In this case, it always returns that we are looking for a properly defined utility class.
    
    Parameters:
    
    description - the Description object to use to report the "to" object
  - assertThatClassIsUtility
```
public static void assertThatClassIsUtility(Class<?> clazz)
```
    Assert that the given class adheres to the utility class rules.
    
    Parameters:
    
    clazz - the class to check
    
    Throws:
    
    AssertionError - if the class is not a valid utility class